Construction of ceiling, roofs, or the like.



No. 724,717. PATENTED APR. 7, 1903.

J. KIILHANEK.

CONSTRUCTION 0F GEILINGS, ROOFS, OR THE LIKE.

\ APPLICATION FILED AUG. 25. 1902 30 MODEL.

fl l'z asses.

UNITED STATES PATENT OFFICE.

JAN KULHANEK, OF PRAGUE, AUSTRIA-HUNGARY.

CONSTRUCTION OF CEILINGVS,'RO OFS, OR THE LIKE.

SPECIFICATION forming part of Letters Patent No. 724,717, dated April 7,1903.

Application filed August 25,1902. Serial No. 120,964. (No motleh) T0 aZZwhom it mag concern.-

Be it known that I, JAN KULHANEK, a citizen of the Empire ofAustria-Hungary, residing at Prague, in the Kingdom of Bohemia,Austria-Hungary, have invented certain new and useful ImprovementsRelating to the Construction of Root and Ceiling Plates; and I. dohereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to whichit appertains to make and use the same. 7

This invention relates to a novel construc tion for ceilings androof-plates or roofs, which consists of two layers of mortar arranged ata certain interval one from the other and provided with-a wireinsertion, these plates being connected one with the other by means ofvertical stays or webs of concrete or the like running in twointersecting directions, the spaces remaining between the stays andplates being filled either permanently or merely until the hardening ofthe stay or web portion with a filling material of any suitable kindsuch, for example, as cork-stone.

In the. accompanying drawings, Figure 1 illustrates in cross-section aplate formed in accordance with this invention. Fig. 2 is a sideelevation of an unfinished plate, illustrating a phase in themanufacture before the artificial stone is embedded in the mortar. Fig.3 is a plan viewfthereof. Fig. 4 represents a plate intended for largespans and, provided with two superposed rows of stays.

According to this invention the improved plate illustrated in Fig. 1 ismanufactured by forming'a layer a of from two to six centimeters inthickness and consisting of xylolith, cement, or concrete upon a surfacem, Fig. 2, corresponding in size to the dimensions of the plate to bemanufactured and laying thereon two rows running at right angles one tothe other of iron bars I) from three to fifteen millimeters thick atintervals of from about ten to thirty millimeters. In the panels formedby the intersecting bars are inserted blocks of artificial stone 0 ofparallelepiped (preferably cubical) form, which should be of smallspecific weightsuch as scoria stone, cork stone, or the like=the base ofthese blocks being of such a size that there remains between each twoadjacent stones 0 an interval of from two to four millimeters, Figs. 2and 3. When these blocks 0 have been placed in position, the intervalsbetween them are filled with concrete or other suitable mortar, theupper face of the blocks being also covered with a layer of mortar somethree to six centimeters in thickness, in which, if desired, iron barsor Wires 1) may be inserted in the same manner as in the lower layer a.

The plate shown in Fig. 4: is constructed in a'similar manner to thatshown in Figs. 1, 2, and 3; but after the upper layer f of mortar hasbeen formed with wire insertion, if desired, a further layer ofparallelepiped or cubical'blocks c is formed with intervals be-' tweenthem, thejoints filled with mortar, and the blocks covered with a layerf of mortar.

The operation of placing the stones in position should be carried out asrapidly as possible, so that the mortar poured into the intervalsbetween them and covering them may forma good connection with that ofthe lower plate or layer.

Plates formed in this manner and intended more especially as root orceiling plates for temporary buildings are bad conductors of heat, areabsolutely sound-proof, and present great rigidity owing to theintersecting series of stays d formed by the mass of mortar between thestones 0. The finished plates, Fig. 1, are arranged in such a mannerthat the iron bars or wires b, which are especially intended for thereception of the tension strains of the roof, are situated below, whilethe compression strains are taken by'the upper layer f and the system"of stays.

Obviously the thickness of the plates and particularly the height of theblocks 0 to be employed depend upon the width of span or size of theplate, and the various dimensions are governed by this consideration. Itmay be taken as a general rule that the total thickness of the platemust equal approxiand acovering layer of mortar, substantially mately atwentieth or thirtieth of the span. as described.

I claim In testimony whereof I aflix my signature.

A plate for roofs or ceilings consisting of a 5 layer of mortar, wirestays laid thereon cross- JAN KULHANEK ing each other, blocks of stoneset upon the In presence of mortar layer between the wires leavingspaces VICTOR SUMMERT, between them, a mortar filling in said spacesARTHUR SCHURTZ.

